First described as a subspecies, Nososticta solida pilbara (Watson 1969) and subsequently raised to species rank (Watson 1974). Additional information (Watson and Theischinger 1984, Houston and Watson 1988).

Justification:
Listed by (Hawking 1999) as Endangered (EN), due to the extremely small distribution and the threat of water extracting for the nearby mining town, which has considerably lowered the water level of the Millstream Spring. This assessment still stands and the habitat continues to be under threat with the same problems.

This species is endemic to Australia. Distribution: Only known from the oasis of permanent waters, fed by the Millstream aquifer, along the Fortescue River, Pilbara, Western Australia (Watson 1969, Watson and Theischinger 1984).

Watson and Theischinger (1984) state that “Nososticta pilbara is one of the most restricted of any Australian odonate”, and that “it is, however, abundant there occurring in both streams and deep river pools.”